'Number Juggle' printed from http://nrich.maths.org/

Correct solutions were sent in by Jade andSarah from Willaston Primary School,
Isle Of Man and Gemma
from Annesley College, South Australia

Annabelle also from
Annesley College, South Australia explained the process:

"We started with the 90's because it was less then 100 but still
close to the numbers in the box. We tried all different starting
points and ended up with 99. To see if 99 worked we took 99 from
127 which gave us 28. Then we took 28 from 201 which gave us
173."